A cokpoba



June26, 1928. Re. 17,007

- H. E. HANSON PLAS'I'ER BOARD Original Filed 0ct.30, 1925 ATTORNEY vUNITED STATES,

PAT OFFICE.

HANS EJHANsoN, orMINNEAroLIs, MINNESOTA, ASSIGNOR, BY nIREo'rAiwDMEsNE IASSIGNMENTS, TQ THE GELOTEX COMPANY, or CHICAGO, ILLINOIS, AconronevrIoN.

PLASTER BOARD.

Original application filed October 30, 1925, Serial No. 65, 7 72.Renewed January 27, 1927. Original No.

1,651,951, dated December 5-,

- This invention relates to the art of building, and the primaryobjectis to provide an improved construction of plaster wall, wherein theplaster. is carried by a plaster base, WhlCh ln turn is carried orsupported ,by studdings or other means forming the rigid or centralportion of the wall. A second object is to provide an improved,practical, and eificient form ofplaster base, the same consisting of aseries of panels or boards having roughened outer surfaces, to which theapplied plaster will cling, and which are so constructed that they willtend to support or brace each other whilein their permanent positions inthe wall. Further and more specific objects will be disclosed in thecourse of the following specification, reference being had to "theaccompanying drawing, wherein:

Fig. 1 is a perspective view of an upper cornerportion of a room,showing'the construction of the improved wall and'the application of myimproved plaster base.

Fig. 2 is an enlarged detail perspective view of one of my improvedplaster boards,

the board here shown also illustrating a modification of theconstruction shown in Fig. 3 is an enlarged detail section on I eitherof the lines 33 in Fig. 1. J

Referring to the drawing more particularly and by reference characters Adesignates the ceiling of a room having walls B and C. The ceiling A andWall C are shown as fully plastered, while the wall 13 is only partlycovered by plaster 4, so as to expose and illustrate'my wall basestructure, Which is made up of boards or panels D, the same being nailedor otherwise suitably secured to the usual studdings E of the wall.

Although each board Dis formed of asingle piece'of material, it presentsthe appearance of two rectangular sections or panels, one of which isdiagonally offset from the other, with a result that the board or entirepanel has ,an upwardly projecting rear. flange or reduced portion, 5, acorresponding rear end flange G and two opposed but front flanges 7 and8. As shown'in" Fig. 3 the flange 6 of one board is wider than theflange 8 of the adjacent board, so as to leave 1927. Application forreissue filed March 21, 1928.; Serial No. 263,488.

a space or groove 9 when the boards are placed end to end. Similarly,the flange 7' 1s narrower than'the flange 5, so as to leave a horizontalchannel 10 between adjacent tiers of boards. It may also be noted thatthe total thicknesses of the flanges 6 and 8, or 5 and is less than thethickness of a board, so that, in addition to the channel 9 (or 10)there will be left aspace 11, between the' overlapping flanges, so thatthe opening 911 will be substantially L-shaped in cross section, and assuch will form very eflicient keys 4 in the plaster 4t. Stated in otherwords, the opposed flanges "6 and 8 (or, 5 and .7) of each board'havedifferentcross sectional areas, so that when they are complemented bysimilar flanges of adjacent Y boards they will leave channels for thereception of the plaster portions 4, and, it may here be noted thatthese plaster poi-.- tions 4 not only serve as keys, but, as they alsoincrease the thickness of the applied plaster sheet proper, at the boardjoints,

they form reinforci ng ribs or ridges for the plaster sheet, so astolessen the possibilityof the plaster cracking at the joints, such asmight otherwise occur under distortional' I action of the boards D. Whenthe boards are made in large sizes it is found very desirable to providethem with-channels or grooves 12 in their faces, as shown in Fig.

2, which channels are similar in many respects to the grooves or spaces9 and 10.

,In constructing plaster board bases,.'as a substitute for the moreexpensive and slower method of lathing, it has been the'custom to useplain sheets of the board, and preferably in large sizes, forconvenience in applying, and such boards have been cut so as to meet, orsubstantially meet, at the studding centers, and at such ends werenailed to' the st uddings. They have no overlapping flanges at eitherends or top and bottom and therefore the vertical edges, at least, mustend at and be secured to the permanent uprights. Consequently, as thestudding centers will seldom correspond with the horizontal dimensionsof the boards, it'is necessary to saw off the projecting ends, resulting.in a great loss of material.

Further- 'more, if the it ofv a board is tight or. close 'and objectionsI have perfected the plaster base structure above described. By reasonof the flanges 5, 6, 7 and 8, which overlap and reinforce each other, itis not necessary that the ends of the boards meet or terminate at thestuddings and it is only necessary that the boards be cut possibly atone end or at the top'or bottom of the wall, depending upon where thelast boards of the wall are secured. In other'words they can be mailedin place much in the same manner as the laying of hardwood floors orbrick walls.

As the boards are comparatively small, or if large are provided with thechannels 12,

the spaces 9, l0, and 12 are sufficient to prevent noticeable swellingby moisture,-espe cially-as such moisture as is absorbed from theplaster is limited to a shallow. depth immediately adjacent to the outeror roughened surface of the board. Furthermore the offset or staggeredcondition of the plaster keys 4" insures the retention of the driedplaster sheet to the entire wall and thoroughly fills all the spacesbetween the adjacent boards, with the reinforcing advantages previouslynoted. Incidentally the overlapping flange arrangement insures athorough insulation against the transmission of heat through thejoints'of the wall.

It ma here be noted that while substantial swe ling or bulging of thewall, by reason of moisture passing from the plaster into the base, isobjectionable, it' is not objectionable, but is, on the other hand,desirable, if not necessary, that the base will absorb such moisture,because that very process greatly assists in setting the plaster, andpermits a heavier coat of plaster. to beapplied than if the base werenon-porous. Furthermore, a nonporous o'r non-moisture- .absorbable basewould no doubt be so hard that it could not be penetrated by or securedwith nails, and its cost would possibly be prohibitive,

It is understood that. suitable modifica-' tions may be' made in thegeneral design and structural details of the invention, as hereindisclosed, provided, however, that such modifications come within thespirit and scope of the appended claims. Having now therefore fullyshown and described my invention, what I claim to be new and desire to.

protect by Letters Patent is:

1. A plaster base comprising a series of panels adapted to be arrangedadjacent to each other in the same plane and having roughened outersurfaces for holding a sheet of plaster applied to the base, each ofsaid panels being provided at opposite edges withreverse flanges adaptedto overlap and complement similar flanges of adjoining panels, saidcomplementing flanges being of diiferent widths whereby channels will remain for the forming of keys in the sheet of plaster applied to thebase.

2. In a wall, a series of adjoining boards having roughened plasterreceiving surfaces, the adjoining ends of each two of said boards havingoverlapping flanges, the total of said overlapping flanges being lessthan the thickness of one of the boards.

3. In a wall, a plurality of adjoining rectangular moisture absorbableplaster boards having plaster-adhering faces, a coat of plaster adheringto the faces, overlapping flanges extending from the edges of said-boards, the opposite flanges of each aboard nels being angularly formedwhereby said keys will be substantially L-shaped in cross section.

5. In .a structure of the character described, a wall, plaster coveringthe wall,

said wall having a plaster adhering surface and horizontal and verticalchannels in its outer face, whereby keys of said plaster will be formedin said channels, said wall comprising tiers of panels placed end to endin staggered relations with respect to the panels above and below, andthe adjoining edges of all of said panels being provided withoverlapping flanges, one each of which flanges is wider than that whichit overlaps.

6. panels adapted to be arranged adjacent to each other in the sameplane and having roughened outer surfaces for holding a sheet of plasterapplied to the base, each of said 'panels'being providedat two oppositeedges A'plaster base comprising a'series of with reversely arrangedreduced edge por will remain for the forming of reinforcing ridges inthe sheet of plaster applied to the base..-

7. A plaster base, for a wall, comprising a plurality of panels arrangedin tiers, with the panels of each tier in staggered relations withrespect to the panels of the adjacent tiers; said plaster base having aplaster adheringsurface and having horizontal and vertical channels inits outer face whereby reinforcin g ribs will be formed in the plaster 5applied' to the base, the adjoining horizontal edges of the panels beingprovided with oVerlappin reduced edge portions, one each of which e geportions is narrower than that i which it overlaps.

I 8. A plaster base member having a plaster adherin outer surface andhaving opposite I v edges with reversely arranged reduced edge portionsadapted to complement similar-edge portions of vother panels' ad oiningsaid edges, said complementing e geportions, having cross sections thearea of one greater than the other, whereby the-complementing edgeportions when in juxtaposition form channels for the reception ofplaster to thereby 'form reinforcing ridges in a-sheet of plasterapplied to the base. 4

. Signed at Minneapolis, Minnesota, this 19th day of March-1928. e rHANS E. HANSON.

